传统的研究方法—模型试验法和经验公式法分别具有成本高、速度慢和适用范围小，数据不可靠等缺点。
The traditional research methods — model testing method and the empirical formula method, have the demerit of cost high, and speed slow, applicable range small and data unreliable.
近些年来，遥感以其信息量大、观测范围广、精度高、数据更新速度快等优点，已成为区域荒漠化监测与评价的主要手段。
Remote sensing, with the merit of large information capacity, huge observation scope, high accuracy and speed, has become the main means of regional desertification monitoring and evaluation.
对观测结果进行了回归分析，讨论了观测数据分散的原因，估计了在一定置信度下加速度观测值的取值范围。
The data obtained are analyzed with the regression analysis method. The cause for the scatter of the measured data and the problem of predicting acceleration are discussed, too.
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